Lutron PHB-318 Pen Humidity/Barometer/Temp Meter

HUMIDITY/BAROMETER/TEMP. METER
Model : PHB-318
* Barometer : 10 to 1100 hPa, mmHg, inHg.
* Humidity : 10% to 95% RH, Dew.
* Temperature : 0 to 50 °C, °C/°F.
* All in one, pen type, easy carryout.
* Hold, Record ( max., min. ).
* DC 1.5V battery ( UM-4, AAA ) x 4.